CN109184198A - Armored concrete girder construction, the method for permanent template and its composition - Google Patents
Armored concrete girder construction, the method for permanent template and its composition Download PDFInfo
- Publication number
- CN109184198A CN109184198A CN201811162316.5A CN201811162316A CN109184198A CN 109184198 A CN109184198 A CN 109184198A CN 201811162316 A CN201811162316 A CN 201811162316A CN 109184198 A CN109184198 A CN 109184198A
- Authority
- CN
- China
- Prior art keywords
- template
- high performance
- ultra
- performance concrete
- permanent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a kind of permanent template, including ultra-high performance concrete layer, the ultra-high performance concrete layer includes bottom plate and the side plate that is set on bottom plate, and the ultra-high performance concrete layer inner surface is laid with groove.In addition, the invention also discloses the armored concrete girder construction, the manufacturing methods that are made of above-mentioned permanent template.Permanent template of the present invention pours normal concrete co-operation with after, and stress is good.Due to ultra-high performance concrete layer and after pour the shear connector being distributed between normal concrete, bond and increase between two kinds of materials, greatly improve the shear-carrying capacity of beam.
Description
Technical field
The present invention relates to civil engineering structure field of reinforcement, it is related to the reinforced beam of a kind of permanent template and its composition
Structure, manufacturing method.
Background technique
Concrete works are divided into Cast-in-situ Concrete Structural Engineering and precast concrete assembly project two major classes, and coagulation
Native prefabricated components are divided into prefabrication and two kinds of in-situ precast again.In the anti-seismic performance and cast-in-place concrete work for improving engineering structure
Journey technology constantly improve under the promotion of two big factors, and cast-in-place concrete has become the main Types in current concrete works.It is existing
The construction of pouring concrete Structural Engineering is divided into three form work engineering, reinforced bar engineering and concreting engineering partitioned projects.Template
It is different because of structure with the sequence of construction of reinforcing bar: pillar and wall body structure generally first assembling reinforcement, rear formwork supporting plate；And contignation one
As first formwork supporting plate, rear assembling reinforcement.Concreting work is carried out after the completion of above two processes again.China was from 50 years 20th century
In generation, starts mainly using the wooden plank sheathing that falls apart and be formed, and to the beginning of the sixties, due to timber resource shortage, starts to develop punching block
Plate, and extensive work is made that the development of steel form and application in subsequent 10 years, so that steel form is fast in China's development
Speed.But some disadvantages are also exposed in use, if steel form bulk area is small, disassembly efficiency is low, and concrete surface is uneven
The problems such as.
In order to save template and shorten the construction period, Japanese scholars propose shell preformed core cast-in-place structural.Premanufactured skin is made
For permanent template, the support molding function of casting concrete can satisfy, and can become the reservation part of building structure, Ji Kecan
With building load-bearing, and the stress performance and service performance of structure can be improved.According to structure use demand, permanent template reaches anti-
Water, heat-insulated, sound insulation, improves durability, reduces the purpose of number of turnover at heat preservation, saves the works such as plastering, levelling, surface layer finishing
Sequence can save engineering construction amount, reduce the use of steel, plank sheathing, saved steel and the forest reserves, while shortening the construction period and mentioning
High efficiency of construction reduces cast in situs amount, and reduces noise, to be conducive to environmental protection.
Ultra-high performance concrete (Ultra-High Performance Concrete, UHPC) is close according to maximum accumulation
Topology degree and fibre reinforced materials technology develop a kind of high-densit cement-base composite material for the superhigh intensity performance to be formed, group
Closestpacking is formed with optimal proportion at material different-grain diameter particle, while adding subtle steel fibre and improving its toughness and prolong
Property.Compared with normal concrete structure, UHPC has the mechanical property of superelevation and the durability of superelevation.And UHPC has had at present
The workability of normal concrete structure, it might even be possible to realize self-compaction, have the condition of engineer application at present.By pouring
The method of forming, UHPC demoulding rear surface is very smooth, and bad with the concrete binding of after-pouring, can not cooperate common carrying.
Summary of the invention
The main purpose of the present invention is to provide permanent template and its armored concrete girder construction, the manufacturing method of composition,
Permanent template and after-pouring concrete bonding are bad in manufacturing process to solve the problems, such as prior art center sill structure.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of permanent template, including very-high performance
Concrete layer, the ultra-high performance concrete layer include bottom plate and the side plate that is set on bottom plate, the very-high performance coagulation
Soil layer inner surface is laid with groove.
The groove being distributed in the present invention enhances the bonding between U-shaped template and rear pouring concrete, and has been obviously improved steel
The shear-carrying capacity of Concrete Beam Reinforced.Further, since the materials ' durability that ultra-high performance concrete is excellent, not only in construction period
Reduce the use of plank sheathing, and overcomes concrete cover in later period use process and crack under natural environmental condition
Caused concrete deterioration and steel bar corrosion, is suitble to build industrialized production.
Permanent template of the present invention pours normal concrete co-operation with after, and stress is good.Due to ultra-high performance concrete layer
The shear connector being distributed between normal concrete is poured with after, is bonded and is increased between two kinds of materials, the shearing resistance for greatly improving beam is held
Carry power.
Further, its cubic compressive strength >=150MPa of the ultra-high performance concrete, flexural strength >=40MPa,
Tensile strength > 8MPa, fracture toughness >=20kJ/m2。
Further, the ultra-high performance concrete permanent template base plate thickness is not less than high 1/ of design girder construction
30。
Further, the ultra-high performance concrete permanent template side plate thickness is not less than wide 1/5 of design girder construction.
Further, the groove is cylinder shape groove, the cylinder shape groove diameter >=15mm, the cylinder shape groove
Height >=5mm.
According to an aspect of the invention, there is provided a kind of armored concrete girder construction, including permanent template, it is set to forever
Steel reinforcement cage inside long template is poured in the normal concrete structure in permanent template, and the permanent template includes very-high performance
Concrete layer, the ultra-high performance concrete layer inner surface are laid with cylinder shape groove.
The groove being distributed in the present invention enhances the bonding between U-shaped template and rear pouring concrete, and has been obviously improved steel
The shear-carrying capacity of Concrete Beam Reinforced.Further, since the materials ' durability that ultra-high performance concrete is excellent, not only in construction period
Reduce the use of plank sheathing, and overcomes concrete cover in later period use process and crack under natural environmental condition
Caused concrete deterioration and steel bar corrosion, is suitble to build industrialized production.
Permanent template of the present invention pours normal concrete co-operation with after, and stress is good.Due to ultra-high performance concrete layer
The shear connector being distributed between normal concrete is poured with after, is bonded and is increased between two kinds of materials, the shearing resistance for greatly improving beam is held
Carry power.
Further, its cubic compressive strength >=150MPa of the ultra-high performance concrete, flexural strength >=40MPa,
Fracture toughness >=20kJ/m2。
Further, the ultra-high performance concrete permanent template base plate thickness is not less than high 1/ of design girder construction
30。
Further, the ultra-high performance concrete permanent template side plate thickness is not less than wide 1/5 of design girder construction.
According to an aspect of the invention, there is provided a kind of manufacturing method of above-mentioned permanent template, comprising the following steps:
1) Zhi Lishe first counts the outer template of girder construction；
2) the inside template of fixed design girder construction after is reserved between outer template and internal template and meets design beam
Horizontally disposed cylindrical body protrusion is arranged in the reserved space of structural requirement, internal template outer surface；
3) ultra-high performance concrete is stirred, and is poured into the reserved space of internal template and outer template；
4) after ultra-high performance concrete layer reaches strength of mould stripping, internal template and outer template are removed；
5) ultra-high performance concrete after molding is placed under the conditions of steam curing and is conserved, thus constitute permanent mould
Plate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of armored concrete girder construction in the present invention.
Specific embodiment
Clear, complete explanation is carried out to the present invention with reference to the accompanying drawing.Those of ordinary skill in the art are being based on these
The present invention will be realized in the case where explanation.Before in conjunction with attached drawing, the present invention will be described, of particular note is that:
The technical solution provided in each section including following the description and technical characteristic in the present invention are not rushing
In the case where prominent, these technical solutions and technical characteristic be can be combined with each other.
In addition, the embodiment of the present invention being related in following the description is generally only the embodiment of a branch of the invention, and
The embodiment being not all of.Therefore, based on the embodiments of the present invention, those of ordinary skill in the art are not making creativeness
Every other embodiment obtained, should fall within the scope of the present invention under the premise of labour.
About term in the present invention and unit.Term in description and claims of this specification and related part
" comprising ", " having " and their any deformation, it is intended that cover and non-exclusive include.
As shown in Figure 1, armored concrete girder construction, including permanent template, the steel reinforcement cage being set to inside permanent template 3,
It pours in the normal concrete structure 4 in permanent template, the permanent template includes ultra-high performance concrete layer, the superelevation
Energy concrete layer inner surface is laid with cylinder shape groove.Permanent template of the present invention, including ultra-high performance concrete layer 2, it is described
Ultra-high performance concrete layer 2 is equal including bottom plate and the side plate being set on bottom plate, 2 inner surface of ultra-high performance concrete layer
Lay fluted 1.
Wherein, its cubic compressive strength >=150MPa of the ultra-high performance concrete, flexural strength >=40MPa, tension
Intensity > 8MPa, fracture toughness >=20kJ/m2.The ultra-high performance concrete permanent template base plate thickness is not less than design beam
Structure it is high 1/30.The ultra-high performance concrete permanent template side plate thickness is not less than wide 1/5 of design girder construction.It is described
Groove is cylinder shape groove, the cylinder shape groove diameter >=15mm, the cylinder shape groove height >=5mm.
The manufacturing method of permanent template, comprising the following steps:
1) Zhi Lishe first counts the outer template of girder construction；
2) the inside template of fixed design girder construction after is reserved between outer template and internal template and meets design beam
Horizontally disposed cylindrical body protrusion is arranged in the reserved space of structural requirement, internal template outer surface；
3) ultra-high performance concrete is stirred, and is poured into the reserved space of internal template and outer template；
4) after ultra-high performance concrete layer reaches strength of mould stripping, internal template and outer template are removed；
5) ultra-high performance concrete after molding is placed under the conditions of steam curing and is conserved, thus constitute permanent mould
Plate.The permanent template of composition is a U-shaped structure.
The manufacturing method of above-mentioned armored concrete girder construction includes the next steps:
1) Zhi Lishe first counts the outer template of girder construction；
2) the inside template of fixed design girder construction after is reserved between outer template and internal template and meets design beam
Horizontally disposed diameter >=15mm is arranged in the reserved space of structural requirement, internal template outer surface, and the cylindrical body of the height >=5mm is convex
It rises；The height of the cylindrical body protrusion is 10mm, diameter 15mm in this embodiment.
3) ultra-high performance concrete is stirred, and is poured into the reserved space of internal template and outer template；
4) after ultra-high performance concrete layer reaches strength of mould stripping, internal template and outer template are removed；
5) ultra-high performance concrete after molding is placed under the conditions of steam curing and is conserved, thus constitute permanent mould
Plate；
6) steel reinforcement cage is placed after the completion of maintenance, and is prepared C30 concrete and poured to molded U-shaped permanent template
It is internal；
7) manufacture gained reinforced beam construction standard is conserved 28 days.
Compression strength 187MPa, C30 the compressive strength of concrete 34.2MPa of permanent template is surveyed by test,
The regular reinforcement coagulation of the more identical size of shear-carrying capacity for the armored concrete girder construction that above structure is constituted through the invention
Tu Liang improves 132%.
The groove being distributed in the present invention enhances the bonding between U-shaped template and rear pouring concrete, and has been obviously improved steel
The shear-carrying capacity of Concrete Beam Reinforced.Further, since the materials ' durability that ultra-high performance concrete is excellent, not only in construction period
Reduce the use of plank sheathing, and overcomes concrete cover in later period use process and crack under natural environmental condition
Caused concrete deterioration and steel bar corrosion, is suitble to build industrialized production.
Permanent template of the present invention pours normal concrete co-operation with after, and stress is good.Due to ultra-high performance concrete layer
The shear connector being distributed between normal concrete is poured with after, is bonded and is increased between two kinds of materials, the shearing resistance for greatly improving beam is held
Carry power.
Related content of the invention is illustrated above.Those of ordinary skill in the art are in the feelings illustrated based on these
The present invention will be realized under condition.Based on above content of the invention, those of ordinary skill in the art are not making creativeness
Every other embodiment obtained, should fall within the scope of the present invention under the premise of labour.
Claims (10)
1. permanent template, which is characterized in that including ultra-high performance concrete layer, the ultra-high performance concrete layer include bottom plate with
And it is set to the side plate on bottom plate, the ultra-high performance concrete layer inner surface is laid with groove.
2. permanent template as described in claim 1, which is characterized in that its cubic compressive strength of the ultra-high performance concrete
>=150MPa, flexural strength >=40MPa, tensile strength > 8MPa, fracture toughness >=20kJ/m2.
3. permanent template as described in claim 1, which is characterized in that the ultra-high performance concrete permanent template bottom plate is thick
Degree is not less than high 1/30 of design girder construction.
4. permanent template as described in claim 1, which is characterized in that the ultra-high performance concrete permanent template side plate is thick
Degree is not less than wide 1/5 of design girder construction.
5. permanent template as described in claim 1, which is characterized in that the groove is cylinder shape groove, and the cylinder is recessed
Slot diameter >=15mm, the cylinder shape groove height >=5mm.
6. armored concrete girder construction, which is characterized in that including permanent template, the steel reinforcement cage being set to inside permanent template, pour
It builds in the normal concrete structure in permanent template, the permanent template includes ultra-high performance concrete layer, the very-high performance
Concrete layer inner surface is laid with cylinder shape groove.
7. armored concrete girder construction as claimed in claim 6, which is characterized in that its cube of the ultra-high performance concrete
Compression strength >=150MPa, flexural strength >=40MPa, fracture toughness >=20kJ/m2.
8. armored concrete girder construction as claimed in claim 6, which is characterized in that the ultra-high performance concrete permanent mould
Board bottom plate thickness is not less than high 1/30 of design girder construction.
9. armored concrete girder construction as described in claim 1, which is characterized in that the ultra-high performance concrete permanent mould
Plate side plate thickness is not less than wide 1/5 of design girder construction.
10. the manufacturing method of permanent template, which comprises the following steps:
1) Zhi Lishe first counts the outer template of girder construction；
2) the inside template of fixed design girder construction after is reserved between outer template and internal template and meets design girder construction
It is required that reserved space, horizontally disposed cylindrical body protrusion is arranged in internal template outer surface；
3) ultra-high performance concrete is stirred, and is poured into the reserved space of internal template and outer template；
4) after ultra-high performance concrete layer reaches strength of mould stripping, internal template and outer template are removed；
5) ultra-high performance concrete after molding is placed under the conditions of steam curing and is conserved, thus constitute permanent template.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811162316.5A CN109184198A (en) | 2018-10-01 | 2018-10-01 | Armored concrete girder construction, the method for permanent template and its composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811162316.5A CN109184198A (en) | 2018-10-01 | 2018-10-01 | Armored concrete girder construction, the method for permanent template and its composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109184198A true CN109184198A (en) | 2019-01-11 |
Family
ID=64946612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811162316.5A Pending CN109184198A (en) | 2018-10-01 | 2018-10-01 | Armored concrete girder construction, the method for permanent template and its composition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109184198A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811768A (en) * | 2019-01-22 | 2019-05-28 | 广东水电二局股份有限公司 | A kind of reinforced concrete structure of anti-seawater corrosion, constructing structure and construction method |
| CN110409283A (en) * | 2019-07-22 | 2019-11-05 | 东南大学 | It is a kind of based on retarded adhesive prestressed UHPC permanent template without the rib prestressed Self-curing combination beam of abdomen and construction method |
| CN110409282A (en) * | 2019-07-22 | 2019-11-05 | 东南大学 | It is a kind of based on permanent post-tensioned prestressing UHPC set decking without the rib prestressed Self-curing combination beam of abdomen and construction method |
| CN110409708A (en) * | 2019-07-22 | 2019-11-05 | 东南大学 | A kind of combination beam permanent post-tensioned prestressing set decking and its installation method |
| CN110424240A (en) * | 2019-07-22 | 2019-11-08 | 东南大学 | Two dimension prestressing unreinforced combination beam and construction method based on retarded adhesive prestressed UHPC permanent template |
| CN110466039A (en) * | 2019-07-22 | 2019-11-19 | 东南大学 | High durable retarded adhesive prestressed UHPC permanently covers decking and installation method |
| CN113482239A (en) * | 2021-07-02 | 2021-10-08 | 哈尔滨理工大学 | High-performance concrete permanent formwork square steel pipe combination beam and manufacturing method thereof |
| CN114396137A (en) * | 2022-01-26 | 2022-04-26 | 香港理工大学 | Construction method of interface between high-strength high-toughness concrete and common concrete |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103224374A (en) * | 2013-04-24 | 2013-07-31 | 东南大学 | Ecological type nanometer super high performance cement based composite material and preparation method thereof |
| CN106223544A (en) * | 2016-07-29 | 2016-12-14 | 华南理工大学 | A kind of ultra-high performance concrete post permanent template and preparation method thereof |
| CN107386528A (en) * | 2017-08-07 | 2017-11-24 | 重庆交通大学 | Method for making the template free of demolition of beams of concrete and making beams of concrete |
-
2018
- 2018-10-01 CN CN201811162316.5A patent/CN109184198A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103224374A (en) * | 2013-04-24 | 2013-07-31 | 东南大学 | Ecological type nanometer super high performance cement based composite material and preparation method thereof |
| CN106223544A (en) * | 2016-07-29 | 2016-12-14 | 华南理工大学 | A kind of ultra-high performance concrete post permanent template and preparation method thereof |
| CN107386528A (en) * | 2017-08-07 | 2017-11-24 | 重庆交通大学 | Method for making the template free of demolition of beams of concrete and making beams of concrete |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811768A (en) * | 2019-01-22 | 2019-05-28 | 广东水电二局股份有限公司 | A kind of reinforced concrete structure of anti-seawater corrosion, constructing structure and construction method |
| CN110409283A (en) * | 2019-07-22 | 2019-11-05 | 东南大学 | It is a kind of based on retarded adhesive prestressed UHPC permanent template without the rib prestressed Self-curing combination beam of abdomen and construction method |
| CN110409282A (en) * | 2019-07-22 | 2019-11-05 | 东南大学 | It is a kind of based on permanent post-tensioned prestressing UHPC set decking without the rib prestressed Self-curing combination beam of abdomen and construction method |
| CN110409708A (en) * | 2019-07-22 | 2019-11-05 | 东南大学 | A kind of combination beam permanent post-tensioned prestressing set decking and its installation method |
| CN110424240A (en) * | 2019-07-22 | 2019-11-08 | 东南大学 | Two dimension prestressing unreinforced combination beam and construction method based on retarded adhesive prestressed UHPC permanent template |
| CN110466039A (en) * | 2019-07-22 | 2019-11-19 | 东南大学 | High durable retarded adhesive prestressed UHPC permanently covers decking and installation method |
| CN110424240B (en) * | 2019-07-22 | 2021-03-19 | 东南大学 | Bidirectional prestress reinforcement-free combined beam based on slow-bonding prestress UHPC permanent template and construction method |
| CN113482239A (en) * | 2021-07-02 | 2021-10-08 | 哈尔滨理工大学 | High-performance concrete permanent formwork square steel pipe combination beam and manufacturing method thereof |
| CN114396137A (en) * | 2022-01-26 | 2022-04-26 | 香港理工大学 | Construction method of interface between high-strength high-toughness concrete and common concrete |
| CN114396137B (en) * | 2022-01-26 | 2023-08-22 | 香港嘉乐科技发展有限公司 | Construction method of interface between high-strength high-toughness concrete and common concrete |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109184198A (en) | Armored concrete girder construction, the method for permanent template and its composition | |
| CN1322211C (en) | Reinforced concrete building floor with solid load-carrying structure | |
| CN106193454A (en) | A kind of permanent template of post ultra-high performance concrete and preparation method thereof | |
| CN214531150U (en) | Novel connection structure of superimposed sheet and cast-in-place roof beam | |
| CN100516404C (en) | Reinforcing-bar concrete building roof with tree-dimensional bearing structure | |
| CN111424848A (en) | Assembled integral type composite heat-insulation shear wall structure and construction method thereof | |
| CN212021104U (en) | Mould roof beam for building | |
| CN114075855A (en) | Large-span bidirectional prestressed concrete multi-ribbed sandwich composite floor slab | |
| CN112523380A (en) | Fire wall is assembled in combination of ultra high performance concrete and foam concrete | |
| CN205894492U (en) | Post ultra high performance concrete's permanent template | |
| CN220166669U (en) | Bridge precast reinforced concrete bridge face structure | |
| CN100441804C (en) | Reinforced concrete stereo bearing structure floorslab | |
| CN100408779C (en) | Steel reinforced concrete stereo force bearing structure floor slab | |
| CN100439619C (en) | Reinforced concrete building floor with solid load-carrying structure | |
| CN100439617C (en) | Steel reinforced concrete stereos force bearing structure floor slab | |
| CN100439618C (en) | Reinforced concrete building floor with solid load carrying structure | |
| CN100408776C (en) | Reinforced concrete three-dimensional bearing structure floor | |
| CN100408777C (en) | Steel reinforced concrete stereo force bearing structure floor slab | |
| CN1782253B (en) | Steel reinforced concrete stereo force bearing structure floor slab | |
| CN100356007C (en) | Reinforced concrete three-dimensional bearing structure floor | |
| CN100412283C (en) | Reinforced concrete stereo bearing structure floorslab | |
| CN100535320C (en) | Reinforced concrete stereo bearing structure floorslab | |
| CN110605776A (en) | Mold beam for building and preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |